// Copyright (C) 2003--2004 Ronan Collobert (collober@idiap.ch)
//                
// This file is part of Torch 3.1.
//
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
//    derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "IOSub.h"

namespace Torch {

IOSub::IOSub(IOBufferize *io_torch_, int offset_, int frame_size_)
{
  io_torch = io_torch_;
  offset = offset_;
  n_sequences = io_torch->n_sequences;
  frame_size = frame_size_;

  if(frame_size > (io_torch->frame_size-offset))
    error("IOSub: the provided frame size is too large...");
}

void IOSub::getSequence(int t, Sequence *sequence)
{
  io_torch->bufferizeSequence(t);
  Sequence *src = io_torch->bufferized_sequence;
  for(int i = 0; i < sequence->n_frames; i++)
    memcpy(sequence->frames[i], src->frames[i]+offset, sizeof(real)*frame_size);
}

int IOSub::getNumberOfFrames(int t)
{
  return io_torch->getNumberOfFrames(t);
}

int IOSub::getTotalNumberOfFrames()
{
  return io_torch->getTotalNumberOfFrames();
}

IOSub::~IOSub()
{
}

}
